An assembly for attachment to a first implant component has a size and shape of a second implant component to be implanted together with the first implant component. The assembly includes a first body defining a protrusion and a second body including a recess into which the protrusion is insertable. When the protrusion is seated within the recess, the first and second bodies are removably connected such that the first and second bodies are prevented from separating. A modular kit includes a plurality of the first bodies each having a different size or shape, and a plurality of the second bodies each having a different size or shape. A method of assembling the assembly includes removably connecting the protrusion of the first body into the recess of the second body, such that the first and second bodies are prevented from separating, and positioning the assembly on the first implant component.
